Cellulose-ether composition



Patented Oct. 9, 1923.

UNETED STATES FATENT @FEEQE.

PAUL C. SEEL, OF ROCHESTER, NEW YORK, ASSIGNOR TO EASTMAN KODAK COM- PANY, OF ROCHESTER, NEW YORK, A. CORPORATION OF NEW YORK.

CELLULOSE-ETHER COMPOSITION.

No Drawing. Application filed January 5, 1923. Serial No. 610,923.

To all whom it may concern: a more rapid setting of the film under man Be it known that I, PAUL C. SEEL, a citufacturing conditions and to meet other izen of the United States of America, re-. technical requirements of the process I may siding at Rochester, in the county of'Monroe "add other substances as a vehicle in which and State of New York, have invented certo carry the ether and mesityl oxide.

tain new and useful Improvements in Cellu- For instance, I may dissolve 100 parts by lose-Ether Compositions, f which the fol- Weight of cellulose ether i a mixture conlowing is a full, clear, and exactspecificataining 20 parts of mesityl oxide, 450 parts tion. of methyl acetate and 50 parts of methyl This invention relates to new composialcohol. Upon evaporation this solution tions of matter in which cellulose ethers are leaves a film containing the cellulose ether mixed with other sustances so that the rewith sufiicient mesityl oxide to impart valusulting product can be advantageously used able properties to it. The volatile vehicle in the plastic and analogous arts, such, for passes away at such a rate that the proinstance, a sheet or film manufacture and duct is not impaired, yet the curing is not varnish manufacture, undesirably prolonged.

One object of my invention is to provide Other substances which impart useful a composition which may be made into qualities to the film may be added if dctransparent, strong and flexible sheets, films sired, such, for instance, as triphenyl or or moulded articles which possess the detricresyl phosphate, camphor, monochlorsired properties in the plastic arts. Furnaphthalene, but these are not indispensa ther objects will hereinafter appear. ble. The ingredients are of the commercial I have discovered that a composition of type and are sufiiciently purified forthe matter having the properties desired in the process of film manufacture, so as to give a.

above mentioned arts can be obtained by dope yielding filmshaving the proper rela-- mixing cellulose ether, say of the type inditive freedom from color,

cated in U. S. Patent, N o. 1,188,376, Lilien- Having thus described my invention What feld, June 20, 1916, with mesityl oxide. I claim as new and desire to secure by Let- Mesityl oxide by itself has the surprising ters Patent is:

property of forming thick solutions of the 1 A composition of matter comprising others; but it may also be employed in concellulose ether and mesityl oxide.

junction with other compounds to meet tech- 2. A composition of matter comprising nical requirements, as will be apparent to ethyl cellulose and mesityl oxide.

those skilled in the art. p 3. A l'lowable composition of matter com- By way of illustration I dissolve cellulose prising cellulose ether, mesityl oxide and an ether, say water-insoluble ethyl cellulose in volatil vehicle carrying such ingredients.

mesityl oxide until a strong, viscous, homo- 4. A. flowable film-forming composition geneous solution is obtained. For instance, of matter comprising water-insoluble ethyl in the preparation of films I may obtain cellulose, mesityl oxide and a volatile vehisuch a concentrated solution as 1 part cle containing methyl acetate and methyl of the ether by weight to from 5 to 7 parts alcohol. 4

of the mesityl oxide. Any desired dilution 5. As an article of manufacture. a dewith mesityl oxide can, of course, be efposited or flowed flexible film comprising fected. Mesityl oxide, as indicated by its cellulose ether and mesityl oxide.

high boiling point, has a relatively small Signed at Rochester, New York, this 20th volatility and consequently film formed day of Dec., 1922.

from a solution of cellulose ether in it alone cures rather slowly. In order to facilitate PAUL o. SEEL. 

